I would continue bleeding the air, do the entire system again if necessary. It will take more than 6 drips to get the air out.
Did you check the brake light wiring as described in previous post #74? Since you installed 2 batteries, the light +hot wire needs to go to the same battery that you have the light ground hooked to. Otherwise you might have voltage to the light but no way for it to get back to the battery that is supplying it.
An alternative would be to mount and hookup a mechanically actuated brake switch, also a pain on one that doesn't have this style. It doesn't care if you have good pressure or air in the lines, all it cares is that you move the brake pedal far enough to let the switch close. Let off the brakes and it opens up again. See below for examples of non-pressure actuated brake switches and an example of how to mount it.
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